JP3056660B2 - Double cassette type magnetic recording / reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-cassette type magnetic recording / reproducing apparatus in which two cassette tapes are loaded on the left and right sides and can be driven simultaneously.

[0002]

2. Description of the Related Art As shown in FIG. 37, a conventional double cassette type magnetic recording / reproducing apparatus of this kind employs a tape transport mechanism 301 for driving a cassette tape.
And a drive circuit 302 for driving the tape transport mechanism 301, and a microcomputer.
The control circuit 303 includes a control circuit 303 for controlling the operation of the tape transport mechanism 301 by controlling the drive circuit 302, and an input operation unit 304 for instructing the control circuit 303 to perform various operations.

[0003] Tape transport mechanism 301
Is a first and second mechanism (hereinafter abbreviated as a mechanical unit) 31 for driving the first and second cassette tapes, respectively.
0.330. The first mechanical unit 310 includes a first
The second mechanical unit 330 includes a mechanical motor 311 and a first mechanical solenoid 312. The second mechanical unit 330 includes a second mechanical motor 331 and a second mechanical solenoid 332.

The input operation unit 304 includes a dubbing button 304
a, first mechanical playback button 304b, first mechanical fast forward button 304
c, first mechanical rewind button 304d, second mechanical replay button 304
e, second mechanical fast forward button 304f, second mechanical rewind button 30
4g and a stop button 304h. That is, this magnetic recording / reproducing apparatus has a function of reproducing, fast-forwarding, rewinding, and stopping the first cassette tape by the first mechanical unit 310 and a function of reproducing the second cassette tape by the second mechanical unit 330. It has playback, fast-forward, rewind, and stop functions, and further has a dubbing function of simultaneously playing back the first cassette tape and recording the playback signal on the second cassette tape.

[0005] Each of the buttons 304a to 304h has a switch, and the operator operates these buttons 304a to 304h.
Is operated, the buttons 304a to 304
h-specific signal is input. Thereby, the control circuit 303
Controls the drive circuit 302, that is, the tape transport mechanism 301, so that the operation instructed by the operated buttons 304a to 304h is performed.

The above-described tape transport mechanism 3
01 is formed on a substrate 305 as shown in FIG. The figure shows a first mechanical unit 310 and a second mechanical unit 33.
0 indicates a stopped state. The first mechanical unit 310 includes a first head base 313, a first overstroke lever 314, a first overstroke lever spring 315, a first solenoid, in addition to the first mechanical motor 311 (not shown) and the first mechanical solenoid 312. Lever 316 and first cam gear 3 urged to rotate clockwise
17 is provided.

Similarly, in addition to the second mechanical motor 331 (not shown) and the second mechanical solenoid 332, the second mechanical section 330 includes a second head base 333, a second overstroke lever 334, and a second overstroke lever. A spring 335, a second solenoid lever 336, and a second cam gear 337 urged to rotate clockwise are provided.

When the operator operates, for example, the first mechanical playback button 304b in the stop state shown in FIG. 38, a signal corresponding to this button operation is input to the control circuit 303, and the first mechanical section 310 The following operation is performed by the control of.

First, after the first mechanical motor 311 is started and a rising time has elapsed, the first mechanical solenoid 312 which has received a signal from the control circuit 303 performs the suction operation of the movable iron core 312a. Accordingly, the first solenoid lever 316 engaged with the movable iron core 312a rotates clockwise, and the engagement between the engagement piece 316a of the first solenoid lever 316 and the engagement piece 317a of the first cam gear 317 is established. It is released, and the first cam gear 317 starts rotating clockwise.

With this rotation, as shown in FIG. 39, the cam engaging shaft 314a of the first overstroke lever 314 engages the cam 317c of the first cam gear 317,
The overstroke lever 314 moves in the direction of arrow C. At this time, since the first head base 313 is arranged to move integrally with the first overstroke lever 314 via the first overstroke lever spring 315, the first head base 313 similarly moves in the C direction.

Thereafter, the engagement piece 316a of the first solenoid lever 316 and the engagement piece 317b of the first cam gear 317 are engaged with each other, after the power supply to the first mechanical solenoid 312 is completed and the original state is restored. Then, the first cam gear 317 stops rotating. As a result, the first mechanical unit 310 enters a driving state, that is, a reproducing operation state.

In the stop state shown in FIG. 38, when the operator operates, for example, the second mechanical reproduction button 304e, a signal corresponding to this button operation is input to the control circuit 303, and the second mechanical section 330 Under the control of the circuit 303, the following operation similar to the operation of the first mechanical unit 310 is performed.

First, after the second mechanical motor 331 is started and the rising time has elapsed, the second mechanical solenoid 332, which has received a signal from the control circuit 303, performs the suction operation of the movable iron core 332a. Accordingly, the second solenoid lever 336 engaged with the movable iron core 332a rotates clockwise, and the engagement between the engagement piece 336a of the second solenoid lever 336 and the engagement piece 337a of the second cam gear 337 is established. It is released and the second cam gear 337 starts rotating clockwise.

By this rotation, as shown in FIG. 39, the cam engaging shaft 334a of the second overstroke lever 334 engages with the cam 337c of the second cam gear 337,
The overstroke lever 334 moves in the direction of arrow C. At this time, since the second head base 333 is arranged to move integrally with the second overstroke lever 334 via the second overstroke lever spring 335, it moves in the direction of arrow C.

Thereafter, the engagement piece 336a of the second solenoid lever 336 and the engagement piece 337b of the second cam gear 337 are engaged with each other when the power supply to the second mechanical solenoid 332 is completed and the original state is restored. Then, the second cam gear 337 stops rotating. As a result, the second mechanical section 330 enters a reproducing operation state.

When the operator operates, for example, the dubbing button 304a in the stop state shown in FIG. 38, a signal corresponding to this button operation is input to the control circuit 303, and the first and second signals are controlled by the control circuit 303. 2 mechanical part 310
330 is the first and second mechanical playback buttons 304b
The same operation as when 304e is operated is performed.

[0017]

However, in the above-mentioned conventional double-cassette type magnetic recording / reproducing apparatus, the first mechanical unit 3
10 and the second mechanical unit 330 are individually provided with a first mechanical motor 311 and a first mechanical solenoid 312, respectively.
A dedicated drive source such as a mechanical motor 331 and a second mechanical solenoid 332 is provided, and each drive source is individually controlled by a control signal of the control circuit 303. Therefore, there is a problem that a large number of drive sources are required and the number of parts is increased, which leads to an increase in cost.

[0018]

In order to solve the above-mentioned problems, a double-cassette type magnetic recording / reproducing apparatus according to the first aspect of the present invention operates to enable at least a recording or reproducing operation on a magnetic tape of a first cassette. A first movable member movably provided at an available position and a retracted position at which the above operation is not possible, and a third movable member at an operable position at least capable of performing a recording or reproducing operation on the magnetic tape of the second cassette. A second moving member movably provided at a retracting position where the third moving member is disposed at an advanced position where the member is disposed, and a retracted position where the above-mentioned operation is not possible, and with the movement of the second moving member. A third moving member that is movable forward and backward to the operable position and the retracted position, and is movable to a movement inhibiting position that prevents movement of the third moving member to the operable position. The movement inhibiting member moves forward and backward with the movement of the second moving member, and moves the movement inhibiting member to the movement inhibiting position, and moves the first moving member along with the movement of the second moving member to the advance position. A first position for moving to the operable position, a second position for not moving the movement preventing member to the movement preventing position and not moving the first moving member to the operable position;
An operation switching member movable to a third position for not moving the movement inhibiting member to the movement inhibiting position and moving the first moving member to the operable position with the movement of the second moving member to the advanced position; Moving the second moving member to the advance position and the retreat position, and moving the operation switching member to the first position, the second position and the third position.
And a driving means for moving to a position.

The double cassette type magnetic recording / reproducing apparatus according to the second aspect of the present invention is the apparatus according to the first aspect of the present invention.
An idler lever provided with a reel base for engaging the reel of the second cassette and winding the magnetic tape, wherein the movement preventing member is provided with an idler gear for transmitting a rotational force in the tape winding direction to the reel base; When the second moving member is located at the retracted position, the idler lever is in a state where engagement with the second reel base is prevented by the second moving member, and the second moving member is When the movable position is moved to the advanced position, the engagement preventing state by the second moving member is released, and when the operation switching member is driven to move to the movement inhibiting position, the operation switching member is connected to the second reel base. It is characterized in that the engagement is kept in a blocked state.

A double cassette type magnetic recording / reproducing apparatus according to a third aspect of the present invention is the apparatus according to the first or second aspect, wherein the first capstan and the first capstan, which run while sandwiching the magnetic tape of the first cassette. A pinch roller, wherein the first moving member presses the first pinch roller against the first capstan as the member moves to the operable position.

According to a fourth aspect of the present invention, there is provided a double-cassette type magnetic recording / reproducing apparatus according to any one of the first to third aspects of the present invention, wherein the second capstan is configured to hold and run the magnetic tape of the second cassette. And a second pinch roller, wherein the first to third positions of the operation switching member are
The first position is set at a position relatively farthest from the second pinch roller, and the second and third positions are set closer to the second pinch roller than the first position to support the second pinch roller. The second pinch roller supporting member is rotatable about one point in a direction in which the second pinch roller is in pressure contact with the second capstan and in a direction in which the second pinch roller is separated from the second capstan. 3
At the time of movement accompanying the movement of the second moving member to the advanced position when being arranged at the position, the second pinch roller is engaged with the second pinch roller support member to press the second pinch roller against the second capstan; The position of the second pinch roller in the pressed state in the second moving member advancing direction is the same when the operation switching member is in the second position and in the third position.

A double cassette type magnetic recording / reproducing apparatus according to a fifth aspect of the present invention is the apparatus according to any one of the first to fourth aspects, wherein the first cassette and the second cassette are arranged such that the axial directions of the respective reels are mutually different. The first moving member is provided in a first mechanism provided at a position close to the first cassette, and the second moving member, the movement preventing member, and the operation switching member are arranged in parallel with each other at left and right positions. , A driving means, and a motor serving as a driving source of the driving means are provided in a second mechanism provided at a position on the second cassette side.

According to a sixth aspect of the present invention, there is provided a double cassette type magnetic recording / reproducing apparatus according to any one of the first to fifth aspects of the present invention, wherein the driving means engages with the second moving member. , And a cam surface that engages with and drives the operation switching member, and is provided with cam means that is rotationally driven.

[0024]

According to the first aspect of the present invention, when the operation switching member moves to the first position and the second moving member moves to the advanced position, the first moving member is driven by the driving means. As the moving member moves, the first cassette moves to an operable position where at least a recording or reproducing operation on the magnetic tape can be performed. On the other hand, since the movement preventing member moves to the movement preventing position, the third moving member does not move to the operable position where at least the recording or reproducing operation on the magnetic tape of the second cassette is enabled. Thereby, the first
At least the recording or reproducing operation on the magnetic tape of the cassette becomes possible, while at least the recording or reproducing operation on the magnetic tape of the second cassette becomes impossible.

When the operation switching member is moved to the second position by the driving means and the second moving member moves to the advanced position, the first moving member does not move to the operable position. On the other hand, since the movement inhibiting member does not move to the movement inhibiting position, the third moving member is moved to the operable position where at least recording or reproducing operation with respect to the magnetic tape of the second cassette is enabled with movement of the second moving member. Moving. As a result, at least the recording or reproducing operation on the magnetic tape of the first cassette becomes impossible, while the second
At least the recording or reproducing operation on the magnetic tape of the cassette becomes possible.

Further, when the operation switching member moves to the third position and the second moving member moves to the advanced position when driven by the driving means, the first moving member moves with the movement of the second moving member. Move to the operable position. Further, since the movement preventing member does not move to the movement preventing position, the third moving member moves to the operable position with the movement of the second moving member. Thereby, at least the recording or reproducing operation on the magnetic tape of the first and second cassettes becomes possible.

As described above, in this magnetic recording / reproducing apparatus,
At least a recording or reproducing operation on the magnetic tape of the first or second cassette by the set of driving means,
In addition, at least a recording or reproducing operation on the magnetic tape of the second cassette, for example, a dubbing operation of reproducing the magnetic tape of the first cassette and recording the reproduced signal on the magnetic tape of the second cassette is possible. Therefore, the magnetic recording / reproducing apparatus can be constituted by a small number of driving means, and cost can be reduced.

According to the second aspect of the present invention, the idler lever is provided with an idler gear, which is engaged with a reel of the second cassette to wind a magnetic tape on a reel base in a tape winding direction. It transmits torque. The idler lever is disposed at a position where the idler gear is not engaged with the second reel base by the second moving member when the second moving member is disposed at the retracted position, and the second moving member moves to the extended position. At this time, the engagement prevention state by the second moving member is released, and the idler gear is arranged to be engaged with the second reel base. The idler lever is arranged at a position where the idler gear is not engaged with the second reel base when the idler lever is driven by the operation switching member and is arranged at the movement preventing position.

In the magnetic recording / reproducing apparatus of the present invention, the idler lever is provided with the function as the movement preventing member, so that the number of parts is reduced and the structure can be simplified.

According to the third aspect of the invention, when the first moving member moves to the operable position, the first moving member moves the first pinch roller to press the first pinch roller against the first capstan.

As described above, in the present magnetic recording / reproducing apparatus, the function of pressing the first pinch roller against the first capstan is provided to the first moving member.
The structure can be simplified.

According to the configuration of the fourth aspect, when the operation switching member moves at the second position and the third position when the second moving member moves to the advanced position when it is arranged at the second position and the third position, the operation switching member is moved to the forward position. The second pinch roller is pressed against the second capstan by engaging with the two-pinch roller support member. The position of the second pinch roller in the pressed state in the second moving member advancing direction is the same when the operation switching member is at the second position and when it is at the third position.

Thus, in the present magnetic recording and reproducing apparatus, the second pinch roller can be pressed against the second capstan by the movement of the operation switching member accompanying the advance operation of the second moving member. The force can be made the same when the operation switching member is in the second position and in the third position. Therefore, at least a recording or reproducing operation on the magnetic tape of the second cassette and at least a recording or reproducing operation on the magnetic tape of the first and second cassettes, for example, reproducing the magnetic tape of the first cassette and transmitting the reproduced signal to the second cassette In the dubbing operation for recording on the magnetic tape, the running state of the magnetic tape of the second cassette can be stabilized.

According to the fifth aspect, by removing the first mechanism, the double cassette type magnetic recording / reproducing apparatus can be changed to a single cassette type magnetic recording / reproducing apparatus including the second mechanism. . Therefore, when a single-cassette-type magnetic recording / reproducing device is required, it is not necessary to develop it separately, and a single-cassette-type magnetic recording / reproducing device can be easily obtained.

According to the sixth aspect of the present invention, the driving means engages with and drives the second moving member,
The magnetic recording / reproducing apparatus has a simple structure for driving the second moving member and the operation switching member since the cam has a cam surface which engages with and drives the operation switching member and is driven. You can do it.

That is, a mechanism for driving the first cassette,
That is, a first mechanism, a mechanism for driving the second cassette,
That is, it is possible to drive the second mechanism unit independently and simultaneously by driving the operation switching member and the second moving member in sequence. This driving can be realized by a very simple configuration including one rotating cam means as a driving means as in the present apparatus.

[0037]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 2, the double-cassette type magnetic recording / reproducing apparatus of this embodiment includes a tape transport mechanism 1 for driving a cassette tape,
A drive circuit 2 for driving the tape transport mechanism 1; a control circuit 3 having a microcomputer for controlling the drive circuit 2 to control the operation of the tape transport mechanism 1; And an input operation unit 4 for instructing the operation.

The tape transport mechanism 1 includes a motor 11, a solenoid 12, and a tape end detection switch 13, and also includes a first and a second mechanism (hereinafter, referred to as a mechanism) for driving the first and second cassette tapes, respectively. 20 and 50).

The input operation unit 4 includes a stop button 4a, a first mechanical playback button 4b, a second mechanical playback button 4c, a dubbing button 4d, a second
A mechanical fast forward button 4e and a second mechanical rewind button 4f are provided. That is, the magnetic recording / reproducing apparatus of the present embodiment
In addition to the functions of playing and stopping the first cassette tape by the mechanical unit 20, the functions of playing, fast-forwarding, rewinding, and stopping the second cassette tape by the second mechanical unit 50 are provided. A dubbing function is provided for simultaneously reproducing the tape and recording the reproduced signal on the second cassette tape.

Each of the buttons 4a to 4f has a switch. When the operator operates these buttons 4a to 4f, a signal unique to each of the buttons 4a to 4f is input to the control circuit 3. The control circuit 3 supplies a pulse signal to the solenoid 12 via the drive circuit 2. Each pulse signal at this time is as shown in FIG. Thereby, the control circuit 3 controls the tape transport mechanism 1 so that the operation instructed by the operated buttons 4a to 4f is performed.

The double cassette type magnetic recording / reproducing apparatus is
By operating each of the buttons 4a to 4f of the input operation unit 4,
The following operation modes can be selected.

Stop mode First mechanical reproduction mode Second mechanical reproduction mode Dubbing mode Second mechanical fast-forward mode Second mechanical rewind mode In the above-mentioned dubbing mode, the first mechanical section 20 is set in the reproducing operation state while the second mechanical With the mechanical unit 50 in the recording operation state,
The reproduction signal of the first cassette tape is recorded on the second cassette tape.

The above-described tape transport mechanism 1
Is configured as shown in the plan view of FIG.
1 (not shown in FIG. 1), a solenoid 12, a tape end detection switch 13, a first mechanical unit 20 as a first mechanical unit, and a second mechanical unit 5 as a second mechanical unit.
0 is provided. These first and second mechanical units 20 and 5
Numerals 0 are arranged side by side in the figure.

The first mechanical section 20 includes a first head base 21, a first overstroke lever spring 22, a first overstroke lever 23 as a first moving member, a first take-up reel base 24, a first pinch roller lever. 25, a first pinch roller 26, a first capstan 27, a first idler lever 28, and a first idler gear 29.

The first head base 21 has a magnetic head (not shown) mounted on its surface, and has guide holes 21 extending in the direction of arrow CD at the ends in the directions C and D indicated by arrows.
a and 21b. These guide holes 21
The guide pins 14a and 14b of the base 14 are inserted into the a and 21b, respectively.
It can move in any direction.

The first overstroke lever 23 has a shape shown in FIG. 7 and is provided between the first head base 21 and the second mechanical section 50 as shown in FIG. And guide hole 2 extending in the direction of arrow CD at a position on the side of direction D
3a and 23b. Guide hole 23a
The guide pins 14c and 14d of the base 14 are inserted into 23b, and the first overstroke lever 23 is movable in the arrow CD direction. Furthermore, the first overstroke lever 23 has a guide hole 23e at a position in the C direction, a cut-and-raised engagement piece 23f at a position in the D direction, and an engagement piece 23i at an end in the A direction. Have. The guide hole 23e has a shape in which the permitting portion 23h, which is the portion in the D direction, is widened in the direction of arrow B with respect to the blocking portion 23g, which is the portion in the C direction.

First overstroke lever spring 22
The mounting portion 23c cut and raised at the end of the first overstroke lever 23 in the direction D is a coil portion 22.
a. One end of the first overstroke lever spring 22 is engaged with the shaft 14 e of the base 14, and the other end is engaged with the locking edge 21 c of the first head base 21. Therefore, the first overstroke lever 23 is constantly urged in the direction of arrow D by the first overstroke lever spring 22. Further, a protrusion 23d formed on a side edge of the first overstroke lever 23 on the first head base 21 side is arranged in a notch 21d of the first head base 21. Therefore, the first head base 21 and the first overstroke lever 23 move integrally in the arrow CD direction.

The first take-up reel base 24 is for engaging with the reel of the first cassette tape to take up the magnetic tape, and is attached to the base 14.

The first pinch roller lever 25 is rotatably supported on the base 14 by a shaft 14h, and the first pinch roller 26 is rotatably mounted on the first pinch roller lever 25. The first pinch roller lever 25 is
It is constantly urged in a direction away from the first capstan 27 by a spring (not shown). The first capstan 27 is always rotated counterclockwise by receiving a rotational force from the motor 11 by an endless belt (not shown). Therefore, when the first pinch roller 26 is pressed against the first capstan 27, the magnetic tape of the first cassette tape sandwiched between the first pinch roller 26 and the first capstan 27 engages with the first take-up reel table 24. Is sent to the reel side.

The first idler lever 28 is rotatably supported on the base 14 by a shaft 14i, and a first idler gear 29 for rotating the first take-up reel base 24 is rotatably mounted on the first idler lever 28. Installed. The first idler lever 28 is constantly urged counterclockwise by a spring (not shown), and has a cut-and-raised engagement piece 28a at a position on the C direction side. This engagement piece 28
a is a guide hole 23 of the first overstroke lever 23
e. When the first overstroke lever 23 is located on the D direction side, the engagement piece 28a engages with the blocking portion 23g of the guide hole 23e. In this case, the rotation of the first idler lever 28 in the counterclockwise direction is restricted, and the first idler gear 29 does not mesh with the gear of the first take-up reel base 24. On the other hand, the first idler lever 28
Engages with the allowable portion 23h of the guide hole 23e when the first overstroke lever 23 is located on the C direction side. In this case, the first idler lever 2 in the counterclockwise direction
8 is allowed to rotate at a predetermined angle, and the first idler gear 29
Meshes with the gear of the first take-up reel base 24.

The second mechanical section 50 includes a second head base 51 as a third moving member, a second overstroke lever 52 as a second moving member, a second overstroke lever spring 53, and an operation switching member shown in FIG. , A second pinch roller lever 55 as a second pinch roller support member, a second pinch roller 56, a second capstan 57, a second idler lever 58 as a movement preventing member, a second idler gear 59, A spring 60 constituting a second pinch roller supporting member together with the two pinch roller lever 55, a second take-up reel table 61, a second supply reel table 62, an FF gear 63, an FF / REW lever 64 shown in FIG.
An FF / REW gear 65, a solenoid lever 66, a cam means, and a cam gear 67, a fly gear 68, and a solenoid 12, which together with the motor 11 constitute driving means, are provided.

The second head base 51 has a shape shown in FIG. 8, and has a magnetic head 73 mounted on its upper surface. Guide holes 5 extending in the direction of arrow CD are formed at the ends on the C and D directions.
1a and 51b. The second head table 51 is similar to that of FIG.
As shown in the figure, the guide shafts 52a and 52b of the second overstroke lever 52 are inserted into the guide holes 51a and 51b of the second overstroke lever 52, respectively. Therefore, the second head base 51 is movable in the arrow CD direction with respect to the second overstroke lever 52. Further, the second head base 51 has an engagement piece 51d at an end position in the C direction on the A direction side.

The second overstroke lever 52 is shown in FIG.
And the guide shafts 5 arranged in the direction of the arrow CD.
2a and 52b, formed near the end in the C direction,
It has a guide hole 52c extending in the D direction, and a mounting piece 52d cut and raised at the end in the D direction. As shown in FIG. 1, a guide shaft 14f of the base 14 is inserted into the guide hole 52c, and the second overstroke lever 52 is movable in the CD direction.

Further, the second overstroke lever 5
2 are guide holes 52e and 52 arranged in the direction of arrow AB near the center in the direction of arrow CD and extending in the direction of arrow AB.
f, guide holes 52g and 52h extending in the direction of the arrow AB on both sides of the portion in the direction of the arrow D, engaging edges 52i protruding in the direction of the arrow A in the center of the direction of the arrow CD, and provided near the center to engage the cam of the cam gear 67. 52m of cam engagement shafts
It has a locking piece 52n bent downward at the position in the B direction and an engaging piece 52o bent downward at the end in the B direction of the C direction side portion. The engagement edge 52
“i” has a shape in which the allowance portion 52k, which is the D-direction side portion, retreats in the arrow B direction from the blocking portion 52j, which is the C-direction side portion.

Second overstroke lever spring 53
Is mounted by fitting the coil portion 53b into the mounting piece 52d. One end of the second overstroke lever spring 53 is engaged with the shaft 14 g of the base 14, and the other end is engaged with the locking edge 51 c of the second head base 51. Therefore, the second overstroke lever 52 is always moved by the arrow D by the second overstroke lever spring 53.
Biased in the direction.

The mode lever 54 is shown in FIGS.
1, and is located below the second overstroke lever 52 as shown in FIG. The mode lever 54 is provided with a guide shaft 54a arranged on the upper surface side in the direction of the arrow BA.
A guide piece 54c, 54d is provided at both ends of the D-direction side portion, and has an engagement piece 54i at a position of one guide piece 54d. The guide shafts 54a and 54b are inserted into the guide holes 52e and 52f of the second overstroke lever 52, respectively, and the guide pieces 54c and 54d are respectively inserted into the guide holes 52g and 52h.
Has been inserted. Therefore, the mode lever 54 has the arrow A
It is movable in the direction B and, in conjunction with the movement of the second overstroke lever 52, in the direction of the arrow CD. The mode lever 54 is constantly urged in the direction of arrow A by a spring (not shown).

The mode lever 54 has a first position in which the guide piece 54c is disposed at each position shown in FIG. 7 according to each operation mode.
Move to the fourth position. Each of these positions
This is the position for each of the following modes.

First position: First mechanical reproduction mode Second position: Second mechanical reproduction, second mechanical fast forward, second
Each mode of mechanical rewinding Third position: dubbing mode Fourth position: stop mode Further, the mode lever 54 includes an engagement piece 54e and a guide piece 5 bent downward at the position of the guide piece 54d.
A cam engaging shaft 54f provided at a position between 4c and 54d to engage with the cam gear 67, an opening 54g for passing the cam engaging shaft 52m of the second overstroke lever 52 in the direction of the cam gear 67, and a C direction. On the side B in the direction B. The engagement piece 54
e indicates that the mode lever 54 is in the first position on the side indicated by the arrow B most.
When moving to the position, the second idler 58 is rotated clockwise by engaging with the engagement piece 58b of the second idler lever 58.

As shown in FIG. 1, the second pinch roller lever 55 is rotatably supported on the base 14 by a shaft 14j, and a second pinch roller 56 is rotatably attached to the second pinch roller lever 55. Have been. The second pinch roller lever 55 is constantly urged by a spring (not shown) in a direction away from the second capstan 57.

The second capstan 57 receives a torque from the motor 11 by an endless belt (not shown) and always rotates counterclockwise. Therefore, the second pinch roller 56 is
When pressed against the capstan 57, the magnetic tape of the second cassette tape sandwiched between them is sent to the reel side of the second cassette tape that engages with the second take-up reel table 61.

The second idler lever 58 has a shape shown in FIG. 10, and is rotatably supported by the base 14 by a shaft 14k. The second idler lever 58 has a second idler gear 59 for rotating the second take-up reel base 61.
Is rotatably mounted. The second idler lever 58 is constantly urged in the counterclockwise direction by a spring (not shown), and the cut-and-raised engagement piece 58a is located at the position on the C direction side.
And an engagement piece 58b at the end in the direction D.

The engaging piece 58a engages with the engaging edge 52i of the second overstroke lever 52. Engaging piece 58a
Engages with the blocking portion 52j of the engaging edge 52i when the second overstroke lever 52 is located on the D direction side. In this case, the second idler lever 58 in the counterclockwise direction
Is restricted, and the second idler gear 59 does not mesh with the gear of the second take-up reel base 61. On the other hand, when the second overstroke lever 52 is positioned on the C direction side, the second idler lever 58 is
Engage with 2k. In this case, the rotation of the second idler lever 58 at a predetermined angle in the counterclockwise direction is allowed, and the second idler gear 59 meshes with the gear of the second take-up reel base 61.

The second take-up reel table 61 shown in FIG. 6 is for engaging with one of the reels of the second cassette tape to take up the magnetic tape.
This is for rewinding the magnetic tape by engaging with the other reel of the second cassette tape. The FF gear 63 is the second
This is for winding the second cassette tape at high speed in mesh with the take-up reel base 61. These are mounted on the base 14.

The FF / REW lever 64 has a shape shown in FIG. 11, is rotatably attached to the base 14 by a shaft 14m, and is constantly urged clockwise by a spring (not shown). The FF / REW lever 64 has an engaging claw 64a extending in the direction of arrow B, that is, the direction of the solenoid lever 66, in the D direction side portion, and has an engaging piece 64b engaging with the cam gear 67 at the end in the D direction. I have. FF / REW lever 64
As shown in FIG. 6, FF / REW
A gear 65 is rotatably mounted, and an engagement pin 64c is provided at the end in the C direction. The FF / REW gear 65 meshes with the second supply reel table 62 or the FF gear 63 meshes with the second take-up reel table 61.
By rewinding the second cassette tape,
Fast forward. This FF / REW lever 6
The rotation of 4 is performed by the rotation of the cam gear 67 as described later.

The solenoid lever 66 has the shape shown in FIG. 11, and is attached to the base 14 so as to be rotatable about a shaft 14n. The solenoid lever 66 has a substantially U-shaped notched solenoid engaging portion 66a at the end in the B direction, has a locking piece 66e at a position in the A direction, and engages with the engaging claw 66b at the end in the A direction. And a mating piece 66c. The solenoid lever 66 has an engaging claw 66d at a tip end of a portion that branches off and extends in the direction D. The solenoid lever 66 is always urged counterclockwise by a substantially L-shaped spring 69 shown in FIG.

As shown in FIG. 1, the solenoid 12 has a movable iron core 12a, a fixed iron core 12b, and a winding 12c. The movable iron core 12a is urged in the direction of arrow D by, for example, a spring (not shown). 12a with arrow C
Retreat in the direction. The engaging portion 12d of the movable iron core 12a is connected to the solenoid engaging portion 66 of the solenoid lever 66.
a.

In general, there are two types of methods of using a solenoid: suction and adsorption. The suction is performed when the movable iron core 12a is sucked toward the main body of the solenoid 12. In addition, the suction is performed when the movable iron core 12a is completely sucked and held by the main body of the solenoid 12. In the solenoid 12, when energized, the movable iron core 21a is attracted to the fixed iron core 21b and collides.

FIG. 12 is a plan view showing the upper surface of the cam gear 67, FIG. 13 is a cross-sectional view taken along the line XX in FIG. 12, and FIG. 14 is a plan view showing the lower surface seen from the upper surface. As shown in FIG. 15 which is a cross-sectional view taken along the line YY in FIG. 14, the cam has various cams on the upper surface and the lower surface. The cam gear 67 is rotatably attached to the base 14 by a shaft 14o. In FIGS. 12 and 14, angles are set counterclockwise in the state shown in FIG.

An outer peripheral gear 67a is formed on substantially the entire outer peripheral surface of the cam gear 67. The outer peripheral gear 67a has a counterclockwise direction starting at a 0 ° position and a counterclockwise direction starting at a 270 ° position. The toothless portions 67b and 67c from which the tooth surfaces have been removed are formed in two places. These missing tooth portions 67b and 67c are provided for releasing the engagement of the fly gear 68 meshing with the cam gear 67, as shown in FIG.

As shown in FIGS. 12 and 13, five cams A, B, C, D and E are formed on the upper surface of the cam gear 67. The cam A is located at the center, and the cam surfaces A ₁ to
It has the A _7. The cam A reciprocates the second overstroke lever 52 in the direction of arrow CD by engaging the cam engagement shaft 52m of the second overstroke lever 52.

The cam B is located on one side of the cam A and has cam surfaces B _{1 to} B ₃ . This cam B engages with the cam engaging shaft 52m of the second overstroke lever 52 when the cam gear 67 rotates about 190 ° during the reproducing operation or the dubbing operation by the first mechanical unit 20 or the second mechanical unit 50. In this case, the second overstroke lever 52 is moved in the direction of arrow C and is held at the operable position.

The cam C is formed substantially along the outer peripheral edge of the cam gear 67 and has cam surfaces C ₁ and C ₂ . Cam C
Is engaged with the cam engaging shaft 54f of the mode lever 54 when the cam gear 67 rotates about 100 ° during the reproducing operation by the first mechanical unit 20, moves the mode lever 54 in the direction of arrow B, and the cam gear 67 When rotated by 270 °, the mode lever 54 is held at the first position shown in FIG.

The cam D is located inside the cam C in the radial direction of the cam gear 67. The cam D engages with the cam engaging shaft 54f of the mode lever 54 when the cam gear 67 rotates 60 ° or more during the dubbing operation, and moves the mode lever 54 when the cam gear 67 rotates 270 ° as shown in FIG. It is held in three positions.

The cam E is located on the side of the cam A opposite to the cam B and has cam surfaces E ₁ and E ₂ . The cam E is in the mode during the reproducing operation of the first mechanical unit 20 or the second mechanical unit 50, or during the dubbing (when the cam gear 67 rotates 270 °) and the stop (when the cam gear 67 rotates 360 °). The mode lever 54 is moved in the direction of arrow B by engaging with the cam engaging shaft 54f of the lever 54, and when the cam gear 19 rotates 360 °, the mode lever 54 is held at the fourth position shown in FIG. is there.

As shown in FIGS. 14 and 15, on the lower surface of the cam gear 67, cams F to I, a lock piece 67d and a lock piece 67e are formed. Cam F is formed at the center of the cam gear 67 has a cam surface F ₁ to F _3. The cam F is provided with an engagement piece 64 of the FF / REW lever 64.
The FF / REW lever 64 rotates between the stop position and the fast-forward operation position about the shaft 14m by rotation of the cam gear 67.

The cam G is formed on the side of the cam F and has cam surfaces G ₁ and G ₂ . The cam G is engaged with the engagement piece 64b of the FF / REW lever 64, and when the second mechanical unit 50 performs the reproducing operation, the FF / REW lever 64 is moved to the FF / REW gear provided on the FF / REW lever 64. Numeral 65 denotes a position where the FF gear 63 and the second supply reel table 62 do not mesh with each other.

The cam H is located on the outer side of the cam G in the radial direction of the cam gear 67 and has cam surfaces H ₁ and H ₂ . The cam H is an engagement piece 64b of the FF / REW lever 64.
And the FF / REW lever 64 is held at a position where the FF / REW gear 65 meshes with the FF gear 63.

The lock piece 67d is formed at the 90 ° position shown in FIG. 14, and the lock piece 67e is formed at the 0 ° position. These lock pieces 67d and 67e are engaged with the engagement pieces 66c of the solenoid lever 66 to stop the rotation of the cam gear 67 at the rotation position.
That is, the cam gear 67 has a lock piece 67d with an engagement piece 66c.
14 is held at the position shown in FIG. 14, and when the lock piece 67e is engaged with the engagement piece 66c, it is held at a state rotated by 270 ° from the state shown in FIG.

As shown in FIG. 5, the fly gear 68 is located at the position A in the direction of the cam gear 67 and the outer gear 6 of the fly gear 68.
7a is provided so as to be meshable. This fly gear 68
Is always rotated counterclockwise integrally with the second capstan 57.

The cam gear 67 which rotates by meshing with the fly gear 68 stops at the positions where the toothless portions 67b and 67c of the cam gear 67 face the fly gear 68, and locks the engagement piece 66c of the solenoid lever 66 and the cam gear 67. The engagement with the pieces 67d and 67e inhibits clockwise rotation. To rotate the cam gear 67 from this state, the solenoid 12 is energized to rotate the solenoid lever 66 clockwise, and the engagement piece 66c of the solenoid lever 66 and the lock pieces 67d and 67e of the cam gear 67 are rotated.
Release the engagement with. However, the outer gear 67a of the cam gear 67 cannot mesh with the fly gear 68 only by this unlocking operation. Therefore, the cam gear 67
, A biasing force in the clockwise direction is applied from the second overstroke lever 52. Next, a configuration for applying the urging force will be described.

First, as shown in FIG.
0 during the reproduction operation or the dubbing operation.
The overstroke lever 52 is urged in the direction of arrow D by a second overstroke lever spring 53. Then, the cam engaging shaft 52m of the second over-stroke lever 52, presses the cam face B ₂ of cam B in the cam gear 67. This positional relationship is the same during the reproducing operation of the first mechanical unit 20. In the state shown in the figure, the cam engagement shaft 52m is located on the A direction side in the arrow AB direction with respect to the rotation center of the cam gear 67, and the cam gear 67
Arrow D of the second overstroke lever spring 53
The component of the urging force in the direction acts as a force for rotating the cam gear 67 clockwise. Therefore, when the locked state of the engagement piece 66c of the solenoid lever 66 and the lock piece 67e of the cam gear 67 is released, the cam gear 67 rotates slightly clockwise, and the outer peripheral gear 67a becomes the fly gear 68.
Mesh with. As a result, the cam gear 67 is driven by the fly gear 68 to rotate clockwise.

As shown in FIG. 32, the second mechanical unit 5
During the fast-forward or rewind operation of 0, the second overstroke lever 52 is urged in the direction of arrow D by the second overstroke lever spring 53. Then, the cam engagement shaft 5 of the second overstroke lever 52
2 m presses the cam surface A ₇ of the cam A in the cam gear 67. In the state shown in the drawing, similarly, the cam engaging shaft 52m is located on the side of the arrow AB in the direction A with respect to the rotation center of the cam gear 67, so that a force for rotating the cam gear 67 in the clockwise direction is applied. Therefore, thereafter, the cam gear 67 is similarly driven by the fly gear 68 and rotates clockwise.

As shown in FIG. 5, during the stop operation, the second overstroke lever 52 is urged in the direction of arrow D by the second overstroke lever spring 53. Then, the second overstroke lever 5
The second cam engaging shaft 52m is connected to the cam A of the cam gear 67.
It presses the cam surface A _1. In the state shown in the drawing, similarly, the cam engaging shaft 52m is located on the side of the arrow AB in the direction A with respect to the rotation center of the cam gear 67, so that a force for rotating the cam gear 67 in the clockwise direction is applied. Therefore, thereafter, the cam gear 67 is similarly driven by the fly gear 68 and rotates clockwise.

Next, the timing and time of the voltage applied to the solenoid 12 will be described. Solenoid 1
2 are given signals a to f having six types of voltage waveforms shown in FIG. 3 according to each operation mode. In the figure, the horizontal axis indicates elapsed time, and the vertical axis indicates voltage.

Stop signal a, first mechanical reproduction signal b, second mechanical reproduction signal c, dubbing signal d, second mechanical fast-forward signal e
And the second mechanical rewind signal f
a, when the first mechanical playback button 4b, the second mechanical playback button 4c, the dubbing button 4d, the second mechanical fast-forward button 4e, and the second mechanical rewind button 4f are operated.

The stop signal a is a short pulse, for example, 150 ms.
ec pulses only. The first mechanical reproduction signal b is composed of, for example, only a 400 msec pulse that rises at a timing later than the stop signal a. The second mechanical reproduction signal c is composed of only a short pulse rising at the same timing as the first mechanical reproduction signal b, for example, a pulse of 60 msec. The dubbing signal d is the first mechanical reproduction signal b
It consists only of a pulse of, for example, 200 msec which rises at the same timing as that of FIG. The second mechanical fast-forward signal e has a first pulse of, for example, 60 msec, which rises at the same timing as the first mechanical reproduction signal b, and 400 m of this pulse.
It consists of a second pulse of about 210 msec which rises after sec. The second mechanical rewind signal f rises at the same timing as the first mechanical reproduction signal b, for example, 60 msec.
It consists of a first pulse of c and a second pulse of about 400 msec which rises 400 msec after this pulse.

When the stop button 4a is operated from a predetermined operation mode, the stop signal a is immediately issued. On the other hand, the buttons 4b to 4b are used to shift from the stop mode to the predetermined operation mode.
When f is operated, the corresponding signals b to f are emitted after a predetermined time, for example, about 200 msec. This is to secure a rising time until the motor 11 reaches a predetermined number of revolutions when shifting from the stop mode to the predetermined operation mode. Further, when the buttons 4b to 4f for switching from one operation mode to another operation mode are operated, a stop signal a for an immediate stop mode is issued,
For example, after a rise time of about 350 msec, that is, after the transition to the stop mode is completed, a predetermined signal corresponding to another operation mode is issued.

Further, the first take-up reel base 24 is
As shown in FIG. 7, a circular rotary cam 24a is provided. The rotating cam 24a is provided at a position eccentric with respect to the rotation center of the first take-up reel base 24, and rotates integrally with the first take-up reel base 24. The tape end detection switch 13 is provided on the outer periphery of the rotary cam 24a. This tape end detection switch 13
As shown in FIGS. 16A and 16B, the rotary cam 24a has a movable portion 13a and a fixed portion 13b that are in sliding contact with the outer peripheral surface of the rotary cam 24a. The movable portion 13a includes a rotating cam 24a,
When the take-up reel base 24 rotates, it is driven by the rotating cam 24a to move toward and away from the fixed portion 13b, ie, ON / OFF.
Perform the operation. FIG. 16A shows the ON operation, and FIG.
The FF operation is shown. This operation generates a pulse signal, which is input to the control circuit 3. On the other hand, when the rotating cam 24a, that is, the first take-up reel base 24 is stopped,
No pulse signal is input to the control circuit 3. Therefore, based on the presence or absence of the pulse signal, the control circuit 3 determines whether or not the winding of the first cassette tape is completed, that is, the first mechanical unit 2
It can be determined whether or not 0 is in the playback state. When determining that the reproduction state is completed, the control circuit 3 outputs the stop signal a.

The magnetic recording / reproducing apparatus is, for example, as shown in FIG.
7 (a), the opened cassette holder 71
The cassette tape 72 is loaded into the magnetic recording / reproducing apparatus by closing the cassette holder 71 as shown in FIG. 6A to 6C schematically show the side surface of the second mechanical unit 50. The second head base 51 is moved in the direction C, that is, upward from the state shown in FIG. Thus, the magnetic head 73 can be brought into contact with the magnetic tape of the cassette holder 71.

In the above configuration, each mode switching operation of the magnetic recording / reproducing apparatus will be described below.

(1) Switching Operation from Stop Mode to First Mechanical Reproduction Mode In the stop mode, when the operator operates the first mechanical reproduction button 4b, a signal corresponding to this operation is input to the control circuit 3. Thereby, the control circuit 3 starts the motor 11 and supplies the first mechanical reproduction signal b to the solenoid 12 via the drive circuit 2 after the rise time has elapsed.

In the stop mode, as shown in FIGS. 5 and 6, the engagement piece 66c of the solenoid lever 66 comes into contact with the lock piece 67d of the cam gear 67, and the cam gear 67 is held at that position. When the first mechanical reproduction signal b is received in this state, the solenoid 12
a of the suction operation of FIG.
As shown in FIG. 7, the engagement piece 66c and the lock piece 67d are released from engagement with each other in the clockwise direction. At this time, the engagement piece 66c of the solenoid lever 66 collides with the cam I of the cam gear 67.

The unlocked cam gear 67 is rotated clockwise by the urging force of the second overstroke lever spring 53 and the cam engaging shaft 52m to mesh with the fly gear 68, and is further rotated clockwise. I do.

When the pulse portion of the first mechanical reproduction signal b elapses, the voltage of the solenoid 12 is cut off, and the movable iron core 12a is pulled by a spring (not shown) to return to the original state. As a result, the solenoid lever 66 rotates counterclockwise as shown in FIGS.
6c leaves the cam I and returns to the original state. afterwards,
As shown in FIG. 23, the engaging piece 66c of the solenoid lever 66 comes into contact with the locking piece 67e of the rotating cam gear 67, and the rotation of the cam gear 67 stops.

Next, the operation of the mode lever 54 will be described. As shown in FIG. 4, the cam engaging shaft 54f of the mode lever 54 moves the cam surface E ₁ of the cam E in the stop mode.
Is engaged. Thereafter, as shown in FIG. 18, when the solenoid lever 66 is driven by the solenoid 12 to rotate clockwise and the cam gear 67 rotates clockwise from the stopped state, the locking piece 66e of the solenoid lever 66 and the mode lever The engagement pieces 54h of the 54 are engaged, and the movement of the mode lever 54 in the direction of arrow A is prevented. Thus, the cam engaging shaft 54f of the mode lever 54 is held in position engageable with the cam surface C ₁ of cam C in the cam gear 67.
Thereafter, the solenoid lever 66 although returns to the original position, by the rotation of the cam gear 67 in the clockwise direction, the cam engaging shaft 54f is engaged with the cam surface C _1. Further, when the rotation of the cam gear 67 is stopped in the state shown in FIG. 23, the mode lever 54 by engagement with the cam surface C _2, is the most B direction side, i.e. the most first mechanism portion 20 side position FIG.
Move to the first position shown in FIG.

Next, the second overstroke lever 52
Will be described. As shown in FIG. 4, the cam engagement shaft 52m of the second overstroke lever 52 has the cam surface A ₁ of the cam A of the cam gear 67 in the stop mode.
Is engaged. When the cam gear 67 rotates clockwise from the stop state, the cam engagement shaft 52m
There after moving to the first position, reaches the cam surface A ₃ via the cam surface A _2. Position of the cam engaging shaft 52m obtained by the cam face A _3, when the cam gear 67 is rotated in the clockwise direction, the cam engaging shaft 52m is a position capable of engaging the cam B. At this time, the second overstroke lever 5
2 is moving in the direction C position is pushed by the cam surface A _3.
Thereafter, the cam engaging shaft 52m is overcome cam face A _3.
On the other hand, the solenoid lever 66 rotated clockwise by being driven by the solenoid 12 then returns to the original position by the spring force. At this time, as shown in FIG. The engaging piece 52n of the overstroke lever 52 is engaged. Thereby, the second overstroke lever 52 is connected to the cam surface B of the cam B by the cam engagement shaft 52m.
It is held at a position where it can abut against ₁ . Then, the cam gear 6
7 rotates the cam engaging shaft 52m to the cam surface B ₁ of the cam B.
In contact with the cam engaging shaft 52m, as shown in FIGS. 22 and 27, reaches the cam surface B ₂ to farthest from the center of the cam gear 67 in the arrow C direction. At this point, the second overstroke lever 52 moves to the position on the C-direction side most.

Next, the first overstroke lever 23
Will be described. As described above, the mode lever 54 takes the first position that has been moved to the first mechanical unit 20 side, and together with the second overstroke lever 52,
Move in the direction of arrow C. At this time, the guide piece 54c of the mode lever 54 is engaged with the engagement piece 23i of the first overstroke lever 23, and the first overstroke lever 23 is moved along with the second overstroke lever 52, as shown in FIG. Move in C direction.

At this time, the first head base 21 also moves in the direction of arrow C together with the first overstroke lever 23 due to the interposition of the first overstroke lever spring 22. This movement is performed by the guide hole 2 in the first head base 21.
The edges of 1a and 21b are the guide pins 14a of the base 14.
It stops when it comes into contact with 14b.

Next, the operation of the first idler lever 28 will be described. The first idler lever 28 is constantly urged counterclockwise by a spring (not shown). In the stop mode, the engagement piece 28a engages with the blocking portion 23g of the first overstroke lever 23 as shown in FIG. And
Counterclockwise rotation is regulated. Therefore, the first idler gear 29 is separated from the first take-up reel base 24. On the other hand, when the first overstroke lever 23 moves in the direction of arrow C as described above, FIG.
As shown in the figure, the engagement piece 28a of the first idler lever 28
Moves to the permitting portion 23h. As a result, the first idler lever 28 rotates a predetermined angle counterclockwise about the shaft 14i, and the first idler gear 29 is rotated by the first take-up reel base 2.
Mesh with 4.

Next, the operation of the first pinch roller lever 25 will be described. In the stop mode, the first pinch roller lever 25 is constantly urged counterclockwise by a spring (not shown) as shown in FIG. On the other hand, when the first overstroke lever 23 moves in the direction of arrow C as described above, the engagement piece 23f of the first overstroke lever 23 pushes one end of the spring 30 in the direction of arrow C as shown in FIG. Therefore, the first pinch roller lever 25
Rotates clockwise, and the first pinch roller 26 is pressed against the first capstan 27.

In the second mechanical section 50, when the mode lever 54 is located at the first position where the mode lever 54 has moved to the first mechanical section 20 side, the second idler lever 58 is engaged with the engaging piece 58b of the mode lever 54. By being pushed by the engagement piece 54e, it is rotated clockwise around the shaft 14k from the state of FIG. 1 to the state of FIG. Thereby, the engagement between the engagement piece 58a of the second idler lever 58 and the blocking portion 52j of the second overstroke lever 52 is released, and the second idler gear 59 is largely separated from the second take-up reel base 61.

When the second overstroke lever 52 moves in the direction of arrow C, the second head base 51 moves in the direction of arrow C integrally with the second overstroke lever 52 by the interposition of the second overstroke spring 53. And However, as shown in FIG. 21, this movement is prevented by engagement of the engagement piece 51d of the second head base 51 with the engagement piece 58a of the second idler lever 58 rotated clockwise. .

The second head base 5 whose movement is blocked
The position 1 is a position where the magnetic head 73 mounted on the second head base 51 does not contact the cassette tape 72 held on the cassette holder 71, that is, the second cassette tape, as shown in FIG. In the first mechanical reproduction mode, this is a position where there is no problem in attaching and detaching the second cassette tape of the second mechanical unit 50.

When the mode lever 54 is located at the first position closest to the first mechanical unit 20, the engagement piece 54 i of the mode lever 54 is moved in the direction B of the spring 60 provided on the second pinch roller lever 55. Does not engage with side end. Therefore, the second pinch roller lever 55 maintains a position separated from the second capstan 57 without rotating clockwise as shown in FIG. As a result, the reproduction operation state of the first mechanical unit 20 as shown in FIG. 21 is established.

[0105] Also, FF / REW lever 64 is in the stop mode, as shown in FIG. 6, the engaging piece 64b of the FF / REW lever 64 is engaged with the cam surface F ₁ of cam F in the cam gear 67 . Therefore, the FF / REW gear 6
5 is held at a position separated from the second supply reel base 62 and the FF gear 63. Thereafter, FF / REW lever 64, the engaging piece 64b engages the cam surface F ₂ · F ₃ by the rotation of the cam gear 67. When this engagement is completed, the FF / REW lever 64 is moved to the position shown in FIG.
An engaging pin 64 is attached to the engaging piece 52o of the second overstroke lever 52 which is moving in the direction of arrow C by engaging with the cam B.
Rotate clockwise until c engages. Then, FF
/ Engaging piece 64b of the REW lever 64, as shown in FIG. 23, engages the cam surface G ₁ of the cam G, the cam gear 67 when the engaging piece 64b is engaged with the cam surfaces G ₂ times Motion stops. Therefore, during the reproducing operation of the first mechanical unit 20,
The FF / REW gear 65 is held at a position separated from the second supply reel base 62 and the FF gear 63.

(2) Switching Operation from Stop Mode to Second Mechanical Reproduction Mode In the stop mode, when the operator operates the second mechanical reproduction button 4c, a signal corresponding to this operation is input to the control circuit 3. Thereby, the control circuit 3 starts the motor 11 and supplies the second mechanical reproduction signal c to the solenoid 12 via the drive circuit 2 after the rise time has elapsed.

The solenoid 1 receiving the second mechanical reproduction signal c
Reference numeral 2 performs a suction operation, and rotates the solenoid lever 66 clockwise. As a result, the locked state due to the engagement between the engagement piece 66c of the solenoid lever 66 and the lock piece 67d of the cam gear 67 is released, and the cam gear 67 rotates clockwise, meshes with the fly gear 68, and further rotates clockwise. . On the other hand, the solenoid 12 returns to the original state, and accordingly, the solenoid lever 66 also rotates counterclockwise. Then, the engagement piece 66 of the solenoid lever 66
c is a cam gear 67 as shown in FIGS.
, And the rotation of the cam gear 67 stops.

Next, the operation of the mode lever 54 will be described. As shown in FIG. 4, the cam engaging shaft 54f of the mode lever 54 moves the cam surface E ₁ of the cam E in the stop mode.
Is engaged. Thereafter, when the rotation of the cam gear 67 starts, the cam engaging shaft 54f urged in the direction of arrow A by a spring (not shown) is different from the case of the switching operation (1), as shown in FIG. Abuts on a locking edge 14 p formed in the base 14. This operation is performed before the pulse width of the second mechanical reproduction signal c is shorter than the pulse width of the first mechanical reproduction signal b, and the locking piece 66e of the solenoid lever 66 is engaged with the engagement piece 54h of the mode lever 54. This is because the solenoid lever 66 returns to the original state. As a result, the mode lever 54 is arranged at the second position shown in FIG.

The operation of the second overstroke lever 52 is the same as in the case of the switching operation (1). That is,
As shown in FIG. 25, the second overstroke lever 52 moves to the most C-direction position by the rotation of the cam gear 67. The position of the cam engagement shaft 52m in this case is shown in FIG.
As shown in 6, to have reached the cam surface B ₂ of cam B in the cam gear 67.

Next, the operation of the second head base 51 will be described. The second head base 51 is interlocked with the second overstroke lever 52 by the interposition of a second overstroke spring 53. Therefore, in the process of shifting from the stop mode to the second mechanical reproduction mode, the second head base 51 moves in the direction of arrow C as the second overstroke lever 52 moves in the direction of arrow C.

Next, the operation of the second idler lever 58 will be described. In the stop mode, the engagement piece 58a of the second idler lever 58 is engaged with the blocking portion 52j of the second overstroke lever 52, as shown in FIG. 1, and the rotation in the counterclockwise direction is restricted. . Therefore, the second idler gear 59 is separated from the second take-up reel base 61. On the other hand, the second overstroke lever 52 is
In the direction of the arrow, the engagement piece 5 of the second idler lever 58 is moved.
8a engages with the allowance 52k. Accordingly, the second idler lever 58 rotates counterclockwise by a predetermined angle, and the second idler gear 59 meshes with the second take-up reel base 61.

Next, the operation of the second pinch roller lever 55 will be described. In the stop mode, the second pinch roller lever 55 is urged counterclockwise by a spring (not shown), and is held at a position where the second pinch roller 56 is separated from the second capstan 57 as shown in FIG. I have. On the other hand, the mode lever 54 moves to the second position closest to the direction A as described above, and then moves in the direction of arrow C together with the second overstroke lever 52. Therefore, in this process, the engagement piece 54i of the mode lever 54 is
The spring 6 provided on the second pinch roller lever 55
0 and the second pinch roller lever 5
5 rotates clockwise and is pressed against the second capstan 57.

When the mode lever 54 is in the second position, the guide piece 54c is
As shown in FIG. 7, the first overstroke lever 23
Does not engage with the engaging piece 23i. Therefore, the first overstroke lever 23 is moved to the mode lever 54 in the direction of arrow C.
Does not move with the movement of the first mechanical unit 20.
Are held in the state of the stop mode shown in FIG.

The operation of the FF / REW lever 64 is the same as the case of the switching operation (1). That is, FF / R
The EW lever 64 is, as shown in FIG.
The gear 65 is held at a position separated from the second supply reel base 62 and the FF gear 63.

(3) Switching Operation from Stop Mode to Dubbing Mode In the stop mode, when the operator operates the dubbing button 4d, a signal corresponding to this operation is input to the control circuit 3. Thereby, the control circuit 3 starts the motor 11 and supplies a dubbing signal d to the solenoid 12 via the drive circuit 2 after the rise time has elapsed.

The solenoid 12 that has received the dubbing signal d performs a suction operation, and rotates the solenoid lever 66 clockwise. As a result, the locked state due to the engagement between the engagement piece 66c of the solenoid lever 66 and the lock piece 67d of the cam gear 67 is released, and the cam gear 67 rotates clockwise, meshes with the fly gear 68, and further rotates clockwise. . On the other hand, the solenoid 12 returns to the original state, and accordingly, the solenoid lever 66 also rotates counterclockwise. Then, the engagement piece 66c of the solenoid lever 66
Engages with the lock piece 67e of the cam gear 67 as shown in FIGS. 23 and 27, and the rotation of the cam gear 67 stops.

Next, the operation of the mode lever 54 will be described. As shown in FIG. 4, the cam engaging shaft 54f of the mode lever 54 moves the cam surface E ₁ of the cam E in the stop mode.
Is engaged. Thereafter, as shown in FIG. 18, when the solenoid lever 66 is driven by the solenoid 12 to rotate clockwise and the cam gear 67 rotates clockwise from the stopped state, the locking piece 66e of the solenoid lever 66 and the mode lever The engagement pieces 54h of the 54 are engaged, and the movement of the mode lever 54 in the direction of arrow A is prevented.

Thereafter, the cam engaging shaft 5 of the mode lever 54
When 4f can be engaged with the cam D of the cam gear 67, the power supply to the solenoid 12 based on the dubbing signal d ends, and the solenoid 12 and the solenoid lever 66 return to the original state. As a result, the engagement between the solenoid lever 66 and the mode lever 54 is released, and the mode lever 54
The cam engaging shaft 54f engages with the cam D as shown in FIG. Therefore, the lock piece 6 of the solenoid lever 66
When the cam gear 67 is stopped by the engagement of the lock piece 67e of the cam gear 67 with the 6c, the mode lever 54 is arranged at the third position shown in FIG. 7 between the first position and the second position.

The operation of the second overstroke lever 52 is the same as in the case of the switching operation (1). That is,
As shown in FIG. 29, the second overstroke lever 52 moves to the most C-direction position by the rotation of the cam gear 67. The position of the cam engagement shaft 52m in this case is shown in FIG.
As shown in 0, and to have reached the cam surface B ₂ of cam B in the cam gear 67.

Next, the first overstroke lever 23
The operation of the first head base 21 will be described. The third position where the mode lever 54 is disposed is a position where the guide piece 54c of the mode lever 54 can be engaged with the engagement piece 23i of the first overstroke lever 23. Therefore, when the mode lever 54 moves in the direction of arrow C together with the second overstroke lever 52,
As shown in (1), the first overstroke lever 23 moves in the direction of arrow C, and the first head base 8 moves in the direction of arrow C by the interposition of the first overstroke lever spring 22. This movement is stopped when the edges of the guide holes 21a and 21b in the first head base 21 come into contact with the guide pins 14a and 14b of the base 14.

The operations of the first idler lever 28 and the first pinch roller lever 25 are the same as in the case of the switching operation (1). That is, the first idler lever 28 rotates a predetermined angle in the counterclockwise direction, and the first idler gear 29
It is held at a position where it meshes with the take-up reel base 24. Also, the first pinch roller lever 25 rotates clockwise,
The first pinch roller 26 is held at a position where it is pressed against the first capstan 27.

Next, the operation of the second pinch roller lever 55 will be described. As shown in FIG. 31, the third position of the mode lever 54 is a position where the engagement piece 54i can be engaged with the end in the B direction of the spring 60 provided on the second pinch roller lever 55. Therefore, the mode lever 54 is moved together with the second overstroke lever 52 by the arrow C
The second pinch roller lever 55 rotates clockwise when it moves in the direction, and the second pinch roller 56 is pressed against the second capstan 57.

FIGS. 31 and 28 in a state where the second pinch roller 56 is pressed against the second capstan 57.
The portion in the B direction of the spring 60 is substantially perpendicular to the moving direction of the second overstroke lever 52. That is, in the state shown in FIG. 31 and FIG.
Are pressed against the second capstan 57 by the same pressing force.

The operations of the second head base 51 and the second idler lever 58 are the same as in the case of the switching operation (2). That is, the second head base 51 moves in the direction of arrow C together with the second overstroke lever 52, and the second idler lever 58 is held at a position where the second idler gear 59 meshes with the second take-up reel base 61.

(4) Switching from the stop mode to the second mechanical fast-forward mode In the stop mode, when the operator operates the second mechanical fast-forward button 4e, a signal corresponding to this operation is input to the control circuit 3. As a result, the control circuit 3 starts the motor 11 and supplies a second mechanical fast-forward signal e to the solenoid 12 via the drive circuit 2 after the rise time has elapsed.

The solenoid 12, which has received the second mechanical fast-forward signal e, performs a suction operation and rotates the solenoid lever 66 clockwise. As a result, the locked state due to the engagement between the engagement piece 66c of the solenoid lever 66 and the lock piece 67d of the cam gear 67 is released, and the cam gear 67 rotates clockwise, meshes with the fly gear 68, and further rotates clockwise. . On the other hand, the solenoid 12 returns to the original state, and accordingly, the solenoid lever 66 also rotates counterclockwise. Then, the engagement piece 6 of the solenoid lever 66
32c is a cam gear 6 as shown in FIGS.
7, and the rotation of the cam gear 67 is stopped.

Since the second mechanical fast-forward signal e is composed of a first pulse and a second pulse following the first pulse as shown in FIG. 3, the solenoid 12 operates twice during the above operation. A suction operation is performed, and after the second suction operation is completed, the engagement piece 66c and the lock piece 67e are engaged.

The operation of the mode lever 54 is the same as in the case of the switching operation (2). That is, the mode lever 54
Is arranged at the second position shown in FIG.

Next, the second overstroke lever 52
Will be described. As shown in FIGS. 4 and 5, the cam engagement shaft 5 of the second overstroke lever 52
2m is the cam A in the cam gear 67 in the stop mode.
It engages the cam surface A ₁ of the. Cam gear 6 from stop
If 7 is rotated clockwise, the cam engaging shaft 52m, after the mode lever 54 is moved to the second position as described above, reaches the cam surface A ₃ via the cam surface A _2. When the cam engaging shaft 52m is passing through the cam face A _3, the solenoid 12,
Since the current is supplied by the second pulse of the second mechanical fast-forward signal e, the suction operation is performed. Thereby, the solenoid lever 6
6 rotates clockwise, the engaging claw 66d of the solenoid lever 66 does not engage with the locking piece 52n of the second overstroke lever 52. Therefore, after cam engaging shaft 52m is engaged with the cam face A _3, the cam surface _{A 4, A 5, A 6} , A
Engage with ₇ sequentially. In a state where the cam engaging shaft 52m is engaged with the cam surface A _7, the cam gear 67 as described above is stopped, the second over-stroke lever 52 stops moving.

When the mode lever 54 is in the second position, the guide piece 54c does not engage with the engagement piece 23i of the first overstroke lever 23.
Therefore, with the movement of the second overstroke lever 52, that is, the mode lever 54, the first overstroke lever 23, the first head table 21, the first
Idler lever 28 and first pinch roller lever 25
Does not work.

[0131] The second head block 51 moves the second over-stroke lever 52 integrally with, and the second over-stroke lever 52 when the cam engaging shaft 52m is engaged with the cam surface A ₇ of the cam gear 67 The position of the second head table 51 is a position slightly moved in the direction of arrow C from the position in the stop mode. At the position of the second head base 51, the magnetic head mounted on the second head base 51 does not come into contact with the magnetic tape of the second cassette tape.

The second idler lever 58 has its engaging piece 5
8a and blocking portion 52 of second overstroke lever 52
Since the engagement state with j is maintained, it does not rotate counterclockwise. Accordingly, the second idler gear 59 is kept separated from the second take-up reel base 61.

The second pinch roller lever 55 has a small movement of the second overstroke lever 52 in the direction of arrow C, and the spring 60 is moved by the engagement piece 54i of the mode lever 54.
Does not rotate in the clockwise direction because one end of is not pushed in the C direction. Therefore, the second pinch roller 56 is kept separated from the second capstan 57.

As shown in FIG. 6, when the FF / REW lever 64 is in the stop mode, the engaging piece 64b of the FF / REW lever 64 is moved to the cam surface F ₁ of the cam F in the cam gear 67.
Is engaged. Therefore, the FF / REW gear 65 is
It is held at a position separated from the supply reel table 62 and the FF gear 63. On the other hand, the rotation of the cam gear 67 causes F
The engaging piece 64b of the F / REW lever 64 is successively engaged with the cam surface F _2, F ₃ of cam F. Thereafter, FF / REW lever 64, by the engagement piece 64b is disengaged from the cam surface F _3, rotates clockwise around the shaft 14m,
As shown in FIG. 33, the engagement pin 64c stops when it comes into contact with a locking edge 14q formed in the opening of the base 14. In this state, the FF / REW gear 65 meshes with the FF gear 63. Therefore, the second mechanical unit 50 enters the fast-forward operation state.

(5) Switching Operation from Stop Mode to Second Mechanical Rewind Mode In the stop mode, when the operator operates the second mechanical rewind button 4f, a signal corresponding to this operation is input to the control circuit 3. You. Thereby, the control circuit 3 starts the motor 11 and supplies the second mechanical rewind signal f to the solenoid 12 via the drive circuit 2 after the rise time has elapsed.

The solenoid 12 that has received the second mechanical rewind signal f performs a suction operation, and rotates the solenoid lever 66 clockwise. As a result, the locked state due to the engagement between the engagement piece 66c of the solenoid lever 66 and the lock piece 67d of the cam gear 67 is released, and the cam gear 67 rotates clockwise, meshes with the fly gear 68, and further rotates clockwise. . On the other hand, the solenoid 12 returns to the original state, and accordingly, the solenoid lever 66 also rotates counterclockwise. Then, the engagement piece 6 of the solenoid lever 66
6c engages with the lock piece 67e of the cam gear 67 as shown in FIG. 35, and the rotation of the cam gear 67 stops.

Since the second mechanical rewind signal f is composed of a first pulse and a second pulse following the first pulse as shown in FIG. 3, the solenoid 12 is operated twice during the above operation. After the second suction operation is completed, the engagement between the engagement piece 66c and the lock piece 67e is performed.

The operations of the mode lever 54 and the overstroke lever 52 are the same as the switching operation of the above (4). That is, the mode lever 54 is arranged at the second position shown in FIG. The second overstroke lever 52 is disposed at a position slightly moved in the direction of arrow C from the position in the stop mode.

As shown in FIG. 6, when the FF / REW lever 64 is in the stop mode, the engaging piece 64b of the FF / REW lever 64 is moved to the cam surface F ₁ of the cam F in the cam gear 67.
Is engaged. Therefore, the FF / REW gear 65 is
It is held at a position separated from the supply reel table 62 and the FF gear 63. On the other hand, the rotation of the cam gear 67 causes F
The engaging piece 64b of the F / REW lever 64 is successively engaged with the cam surface F _2, F ₃ of cam F. Thereafter, when the cam gear 67 further rotates, the solenoid 12 performs the suction operation by the second pulse of the second mechanical rewind signal f, and the solenoid lever 66 rotates clockwise. As a result, FIG.
As shown in the figure, the outer edge of the engaging claw 66b of the solenoid lever 66 engages with the outer edge of the engaging claw 64a of the FF / REW lever 64, and the clockwise rotation of the FF / REW lever 64 is prevented. You.

Next, the engaging piece 6 of the FF / REW lever 64
4b is the cam surface H ₁ of the cam H due to the rotation of the cam gear 67.
, The solenoid 12 returns to the original state by the end of the second mechanical rewind signal f. As a result, the solenoid lever 66 returns to the original state, and the engagement claws 66b
The engagement between the members 4a is released.

Thereafter, the FF / REW lever 64 is
As shown in FIG. 5, the engagement piece 64b is formed on the cam surface H ₁ of the cam H,
By sequentially engaging with H ₂ , it rotates counterclockwise about the shaft 14m. Then, in a state where the engagement piece 64b is engaged with the cam surface H _2, rotation of the cam gear 67 as described above is stopped, FF / REW gear 65 is meshed with the supply reel base 28. Therefore, the second mechanical unit 50 enters the rewinding operation state.

(6) Switching Operation from First Mechanical Reproduction Mode to Stop Mode by Detection of Tape End The control circuit 3 detects the end of the first mechanical reproduction state based on the presence or absence of a pulse signal from the tape end detection switch 13. Then, a stop signal a is supplied to the solenoid 12 via the drive circuit 2.

In the first mechanical reproduction state, as shown in FIG. 23, the engagement piece 66c of the solenoid lever 66 is engaged with the lock piece 67e of the cam gear 67, and the cam gear 67 is held at this position.

On the other hand, the solenoid 12 receiving the stop signal a
Performs a suction operation and rotates the solenoid lever 66 clockwise. As a result, the engagement between the engagement piece 66c and the lock piece 67e is released, and the cam gear 67 rotates clockwise. Engagement of the cam engaging shaft 52m of the second over-stroke lever 52 by rotation of the cam gear 67 is switched from the cam surface B ₂ of the cam gear 67 to the cam surface B _3, further switched to the cam surface A _1. At this time, the stop signal a
Has passed, and the solenoid 12 and the solenoid lever 66 have returned to their original state. Therefore, the engagement piece 66c of the solenoid lever 66 and the cam gear 6
7 is engaged with the lock piece 67d, and the rotation of the cam gear 67 is stopped.

[0145] engagement of the cam engaging shaft 52m as described above by switching from the cam surface B ₂ to cam face A _1, FIG. 1
As shown in (2), the second overstroke lever 52 moves to the stop mode position in the direction of arrow D. This allows
The first overstroke lever 23, which has been pushed in the direction C by the guide piece 54c of the mode lever 54, moves to the stop mode position in the direction of arrow D together with the first head base 21.

By the movement of the first overstroke lever 23, the first idler lever 28 is disengaged from the engagement piece 28a.
Is rotated clockwise by engaging with the blocking portion 23g of the first overstroke lever 23. Therefore, the first idler gear 29 is separated from the first take-up reel base 24.

The first pinch lever 4 rotates counterclockwise since the pressing of the spring 30 by the engagement piece 23f of the first overstroke lever 23 is released. Accordingly, the first pinch roller 26 is separated from the first capstan 27.

The cam engaging shaft 54f of the mode lever 54 is
By rotation of the cam gear 67, is disengaged from the cam C, engaged with the cam surface E ₁ of cam E, the rotation of the cam gear 67 is stopped in this state. Therefore, the mode lever 54 is arranged at the fourth position shown in FIG.

In the magnetic recording / reproducing apparatus of this embodiment, the first mechanical section 20, ie, the first
Although only the reproducing operation is possible with respect to the cassette tape, the present invention is not limited to this, and the reproducing and recording can be performed by the advance of the first head base 21 in the C direction. Is also good. Also, in the second mechanical unit 50, the second overstroke lever 52 in the direction of arrow C
May be configured so that recording can be further independently performed by the movement of.

As described above, in the present magnetic recording / reproducing apparatus,
The reproduction operation of the first mechanical unit 20 is performed by one cam gear 67,
Switching between the reproduction operation of the second mechanical unit 50 and the dubbing operation of recording the reproduction signal of the first cassette tape on the second cassette tape becomes possible. Therefore, the magnetic recording / reproducing apparatus of the present invention requires a smaller number of driving means, and can reduce the cost. It also has a number of cam surfaces on one and the other,
Since the rotating cam gear 67 is used as the driving means, the driving means has a simple configuration.

In the present magnetic recording / reproducing apparatus, the second idler lever 58 is provided with a function as a movement preventing member for preventing the movement of the second head base 51 in the direction C, so that the number of parts is reduced. In addition, the configuration is simplified.

In the present magnetic recording / reproducing apparatus, the function of pressing the first pinch roller 26 against the first capstan 27 is provided to the first overstroke lever 23, and the second pinch roller 56 is connected to the second capstan 57. Since the mode lever 54 is provided with a function of pressing, the number of components is reduced, and the configuration is simplified.

In the magnetic recording / reproducing apparatus, the second pinch when the mode lever 54 is pressed against the second capstan 57 by the mode lever 54 when the mode lever 54 is in the second position and when the mode lever is in the third position. The position of the roller 56 is the same. Therefore, during the recording or reproduction operation of the second cassette tape and the dubbing operation,
The pressing force of the second pinch roller 56 on the magnetic tape of the second cassette tape against the second capstan 57 becomes substantially the same. Therefore, the running state of the second cassette tape can be stabilized during the above operation.

In the present double cassette type magnetic recording / reproducing apparatus, by removing the first mechanical section 20 from the tape transport mechanism 1, the double cassette type magnetic recording / reproducing apparatus can be replaced with a single cassette comprising the second mechanical section 50. Type magnetic recording / reproducing device. Therefore, when a single-cassette-type magnetic recording / reproducing device is required, it is not necessary to develop it separately, and a single-cassette-type magnetic recording / reproducing device can be easily obtained.

The structure of the tape transport mechanism of the single-cassette type magnetic recording / reproducing apparatus is as shown in FIG. The members used in this configuration are the solenoid 12 and the second head base 5 of the members shown in FIG.
1, second overstroke lever 52, second overstroke lever spring 53, second pinch roller lever 55, second pinch roller 56, second capstan 57,
Second idler lever 58, second idler gear 59, spring 60, second take-up reel base 61, solenoid lever 66
And the cam gear 67, the second supply reel base 62, the FF gear 63, the FF / REW lever 64, F shown in FIG.
An F / REW gear 65 and a fly gear 68. On the other hand, the members that are not used are the tape end detection switch 13, the first head base 21, the first
Overstroke lever spring 22, first overstroke lever 23, first take-up reel base 24, first pinch roller lever 25, first pinch roller 26, first capstan 27, first idler lever 28, first idler gear 29 And the spring 30. The base 14 is the second
The size is equivalent to the mechanical unit 50.

[0156]

As described above, the double-cassette type magnetic recording / reproducing apparatus according to the first aspect of the present invention has at least an operable position at which the recording or reproducing operation on the magnetic tape of the first cassette is possible, and the above operation is not possible. A first movable member movably provided at a retractable position where the first movable member can move forward and backward, and an advance position at which the third movable member is disposed at an operable position at which at least a recording or reproducing operation with respect to the magnetic tape of the second cassette is possible; A second moving member provided at a retreat position where a third moving member is disposed at a retreat position where the above operation is impossible, and a second moving member is provided so as to be able to move forward and backward.
A third moving member movable to the operable position and the retracted position, a movement inhibiting member movable to a movement inhibiting position for inhibiting movement of the third moving member to the operable position, and a second moving member While moving forward and backward with the movement of
A first position in which the movement inhibiting member is moved to the movement inhibiting position and the first moving member is moved to the operable position in accordance with the movement of the second moving member to the advanced position, and the movement inhibiting member is moved to the movement inhibiting position. And the second moving member not moving the first moving member to the operable position, and the first moving member being operable with the movement of the second moving member to the advanced position without moving the movement preventing member to the movement preventing position. An operation switching member movable to a third position to be moved to a position, a second movement member to move to the advance position and the retreat position, and the operation switching member to the first position;
And a driving means for moving to the second position and the third position.

As a result, in the present magnetic recording / reproducing apparatus, 1
By a set of driving means, at least a recording or reproducing operation on the magnetic tape of the first or second cassette and at least a recording or reproducing operation on the magnetic tape of the first and second cassettes, for example, reproducing the magnetic tape of the first cassette A dubbing operation of recording the reproduced signal on the magnetic tape of the second cassette is enabled. Therefore, the present magnetic recording / reproducing apparatus can be constituted by a small number of driving means, and has an effect that cost can be reduced.

The double cassette type magnetic recording / reproducing apparatus according to the second aspect of the present invention is the same as the apparatus according to the first aspect,
An idler lever provided with a reel base for engaging the reel of the second cassette and winding the magnetic tape, wherein the movement preventing member is provided with an idler gear for transmitting a rotational force in the tape winding direction to the reel base; When the second moving member is located at the retracted position, the idler lever is in a state where engagement with the second reel base is prevented by the second moving member, and the second moving member is When the movable position is moved to the advanced position, the engagement preventing state by the second moving member is released, and when the operation switching member is driven to move to the movement inhibiting position, the operation switching member is connected to the second reel base. In this configuration, the engagement is kept in a blocked state.

Thus, in the present magnetic recording / reproducing apparatus, in addition to the effect of the first aspect, since the idler lever is provided with the function as the movement preventing member, the number of parts is reduced, and the structure is simplified. It has the effect that it can be done.

The double-cassette type magnetic recording / reproducing apparatus according to the third aspect of the present invention is the apparatus according to the first or second aspect, wherein the first capstan and the first capstan, which run while holding the magnetic tape of the first cassette therebetween. A pinch roller, and the first moving member is configured to press the first pinch roller against the first capstan as the member moves to the operable position.

Thus, in the present magnetic recording / reproducing apparatus, in addition to the effect of the first or second aspect, the function of pressing the first pinch roller against the first capstan is provided to the first moving member. This has the effect of reducing the number of parts and simplifying the structure.

According to a fourth aspect of the present invention, there is provided a double-cassette type magnetic recording / reproducing apparatus according to any one of the first to third aspects, wherein the second capstan is configured to hold and run the magnetic tape of the second cassette. And a second pinch roller, wherein the first to third positions of the operation switching member are
The first position is set at a position relatively farthest from the second pinch roller, and the second and third positions are set closer to the second pinch roller than the first position to support the second pinch roller. The second pinch roller supporting member is rotatable about one point in a direction in which the second pinch roller is in pressure contact with the second capstan and in a direction in which the second pinch roller is separated from the second capstan. 3
At the time of movement accompanying the movement of the second moving member to the advanced position when being arranged at the position, the second pinch roller is engaged with the second pinch roller support member to press the second pinch roller against the second capstan; The position of the second pinch roller in the pressed state in the advance direction of the second moving member is the same when the operation switching member is at the second position and when it is at the third position.

Thus, in the present magnetic recording / reproducing apparatus, in addition to the effects of any one of the first to third aspects, at least the recording or reproducing operation on the magnetic tape of the second cassette and the magnetic recording / reproducing of the first and second cassettes are performed. In at least the recording or reproducing operation on the tape, for example, the dubbing operation of reproducing the magnetic tape of the first cassette and recording the reproduced signal on the magnetic tape of the second cassette, stabilizes the running state of the magnetic tape of the second cassette. It has the effect of being able to do so.

According to a fifth aspect of the present invention, there is provided a double-cassette type magnetic recording / reproducing apparatus according to any one of the first to fourth aspects, wherein the first cassette and the second cassette are arranged such that the axial directions of the respective reels are mutually different. The first moving member is provided in a first mechanism provided at a position close to the first cassette, and the second moving member, the movement preventing member, and the operation switching member are arranged in parallel with each other at left and right positions. , A driving unit, and a motor serving as a driving source of the driving unit are provided in a second mechanism unit provided at a position on the second cassette side.

Thus, in the present magnetic recording / reproducing apparatus, in addition to the effects of any one of the first to fourth aspects of the present invention, when a single cassette type magnetic recording / reproducing apparatus is required, it is not necessary to separately develop the magnetic recording / reproducing apparatus. There is an effect that a cassette type magnetic recording / reproducing apparatus can be easily obtained.

The double cassette type magnetic recording / reproducing apparatus according to the invention of claim 6 is the apparatus according to any one of claims 1 to 5, wherein the driving means engages with the second moving member. And a cam surface that engages with and drives the operation switching member, and includes a cam unit that is rotationally driven.

As a result, the present magnetic recording / reproducing apparatus has an effect that the configuration of the driving means can be simplified in addition to the effect of any one of the first to fifth aspects of the present invention.

[Brief description of the drawings]

FIG. 1 shows a configuration of first and second mechanical units of a double-cassette type magnetic recording / reproducing apparatus according to an embodiment of the present invention, and shows a state of a stop mode of the first and second mechanical units. It is a top view.

FIG. 2 is a schematic block diagram showing an overall configuration of the magnetic recording / reproducing apparatus.

FIG. 3 is a waveform diagram of a voltage supplied to the solenoid shown in FIG. 2;

FIG. 4 is an explanatory view showing an engagement state of each cam of the cam gear with a cam engagement shaft of a second overstroke lever and a mode lever in the stop mode shown in FIG. 1;

FIG. 5 is a plan view showing a state of a second mechanical unit in a stop mode shown in FIG. 1;

FIG. 6 is a plan view showing a state of the FF / REW drive mechanism of the second mechanical unit in the stop mode shown in FIG.

FIG. 7 is a plan view showing shapes of a first overstroke lever and a second overstroke lever shown in FIG. 1 and respective positions that a mode lever can take.

FIG. 8 is a plan view showing a shape of a second head table shown in FIG. 1;

9 (a) is a left side view of the mode lever shown in FIG. 1, FIG. 9 (b) is a plan view thereof, FIG. 9 (c) is a right side view thereof, and FIG. It is a front view.

FIG. 10 is a plan view showing the shape of a second idler lever shown in FIG.

11 is a plan view showing the shapes of a solenoid lever and an FF / REW lever of the FF / REW drive mechanism shown in FIG.

FIG. 12 is a plan view of the cam gear shown in FIG. 1;

FIG. 13 is a sectional view taken along line XX in FIG. 12;

FIG. 14 is a perspective view showing the lower surface of the cam gear from the upper surface side.

FIG. 15 is a sectional view taken along line YY in FIG. 14;

FIG. 16A is an explanatory view showing an ON operation of a tape end detection switch by a rotating cam, and FIG.
FIG. 4 is an explanatory diagram illustrating an FF operation.

FIG. 17A is a schematic side view of the vicinity of a second mechanical portion showing a state where a cassette tape is loaded in an opened cassette holder, and FIG. FIG. 3C is a schematic side view of the vicinity of the second mechanical unit showing a state where a tape is loaded, and FIG. 3C is a schematic side view of the vicinity of the second mechanical unit showing a state where a magnetic head is brought into contact with a cassette tape.

FIG. 18 is a plan view of a second mechanical unit showing a state at the time of solenoid attraction from the state of the stop mode shown in FIG. 5;

FIG. 19 is a plan view showing a state of the second mechanical unit when shifting from the stop mode state shown in FIG. 5 to the first mechanical reproduction mode, the second mechanical reproduction mode, or the dubbing mode.

20 is a plan view showing a state of the FF / REW drive mechanism when shifting from the stop mode state shown in FIG. 6 to the first mechanical reproduction mode, the second mechanical reproduction mode, or the dubbing mode.

FIG. 21 is a plan view showing a state of the magnetic recording / reproducing apparatus shown in FIG. 1 in a first mechanical reproducing mode.

22 is an explanatory diagram showing an engagement state of each cam of the cam gear with a cam engagement shaft of a second overstroke lever and a mode lever in the first mechanical regeneration mode shown in FIG. 21.

FIG. 23 is a plan view showing a state of a first mechanical reproduction mode, a second mechanical reproduction mode, or a dubbing mode in the FF / REW drive mechanism shown in FIG. 6;

FIG. 24 is a plan view showing a state near a second pinch roller lever when the mode lever shown in FIG. 21 is arranged in a first position.

FIG. 25 is a plan view showing a state of the magnetic recording and reproducing apparatus shown in FIG. 1 in a second mechanical reproduction mode.

26 is an explanatory diagram showing an engagement state of each cam of the cam gear with a cam engagement shaft of a second overstroke lever and a mode lever in the second mechanical regeneration mode shown in FIG. 25.

FIG. 27 is a plan view showing a state of a second mechanical reproduction mode or a dubbing mode in the second mechanical unit shown in FIG. 5;

FIG. 28 is a plan view showing a state near a second pinch roller lever when the mode lever shown in FIG. 25 is arranged at a second position.

FIG. 29 is a plan view showing a state of a dubbing mode of the magnetic recording / reproducing apparatus shown in FIG. 1;

30 is an explanatory diagram showing an engagement state of each cam of the cam gear with a cam engagement shaft of a second overstroke lever and a mode lever in the dubbing mode shown in FIG. 29.

FIG. 31 is a plan view showing a state near a second pinch roller lever when the mode lever shown in FIG. 29 is arranged at a third position.

FIG. 32 is a plan view showing a state of a second mechanical fast-forward or rewind mode in the second mechanical unit shown in FIG. 5;

FIG. 33 is a plan view showing a state of a fast-forward mode in the FF / REW drive mechanism shown in FIG. 6;

34 is a plan view showing a state of the FF / REW drive mechanism shown in FIG. 6 at the time of transition from the stop mode to the rewind mode.

FIG. 35 is a plan view showing a state of a rewind mode in the FF / REW drive mechanism shown in FIG. 6;

FIG. 36 is a plan view showing a configuration in a case where a single mechanism of a second mechanical section is removed from the configuration shown in FIG. 1 except for the first mechanical section.

FIG. 37 is a schematic block diagram showing the overall configuration of a conventional double-cassette type magnetic recording / reproducing apparatus.

FIG. 38 is a plan view showing a state of a stop mode in the tape transport mechanism shown in FIG. 37.

FIG. 39 is a plan view showing a state of a dubbing mode in the configuration shown in FIG. 38;

[Explanation of symbols]

REFERENCE SIGNS LIST 1 tape transport mechanism 3 control circuit 11 motor 12 solenoid 13 tape end detection switch 14 base 20 first mechanical unit (first mechanical unit) 21 first head table 23 first overstroke lever (first moving member) 25 1 pinch roller lever 26 1st pinch roller 27 1st capstan 28 1st idler lever 50 2nd mechanical section (2nd mechanical section) 51 2nd head base (3rd moving member) 52 2nd over stroke lever (2nd (Moving member) 54 mode lever (operation switching member) 55 second pinch roller lever (second pinch roller supporting member) 56 second pinch roller 57 second capstan 58 second idler lever (movement preventing member) 60 spring (second) Pinch roller support member) 61 Second take-up reel base 62 Second supply reel base 3 FF gear 64 FF / REW lever 65 FF / REW gear 66 the solenoid lever 67 cam gear (drive means, cam means) 72 Tape

Claims (6)

(57) [Claims] A first movable member provided at an operable position for enabling at least a recording or reproducing operation with respect to a magnetic tape of a first cassette, and a retractable position at which the operation is not possible; At an advanced position where the third moving member is disposed at an operable position where at least recording or reproduction operation can be performed on the magnetic tapes of the two cassettes, and at a retracted position where the third movable member is disposed at a retracted position where the above operation is not possible. A second movable member provided to be capable of moving forward and backward, a third movable member capable of moving forward and backward to the operable position and the retracted position with the movement of the second movable member, and a third movable member to be moved to the operable position. (3) a movement inhibiting member movable to a movement inhibiting position for inhibiting movement of the moving member; and (3) moving forward and backward with the movement of the second moving member, and moving the movement inhibiting member to the movement inhibiting position. A first position in which the first moving member is moved to the operable position in accordance with the movement of the second moving member to the advanced position, and the first moving member is operable without moving the movement inhibiting member to the movement inhibiting position A second position not to be moved to the position, and a third position to move the first moving member to the operable position without moving the movement preventing member to the movement preventing position and moving the second moving member to the advanced position. A possible operation switching member, and driving means for moving the second moving member to the advance position and the retreat position, and for moving the operation switching member to the first position, the second position, and the third position. A double-cassette-type magnetic recording / reproducing apparatus, characterized in that: 2. A reel base for winding a magnetic tape by engaging with a reel of a second cassette, wherein the movement preventing member comprises an idler gear for transmitting a rotational force in a tape winding direction to the reel base. When the second moving member is located at the retracted position, the idler lever is in a state where engagement with the second reel base is prevented by the second moving member, 2 When the moving member moves to the advance position, the second
While the engagement inhibition state by the moving member is released, when the operation switching member is driven and arranged at the movement inhibition position, the engagement with the second reel base is maintained by the operation switching member. 2. The double-cassette type magnetic recording / reproducing apparatus according to claim 1, wherein: 3. A first capstan and a first pinch roller for holding and running the magnetic tape of the first cassette, and wherein the first moving member moves to the operable position with the first capstan. 3. The double cassette type magnetic recording / reproducing apparatus according to claim 1, wherein a pinch roller is pressed against the first capstan. 4. A second capstan and a second pinch roller for nipping and running a magnetic tape of a second cassette, wherein the first to third positions of the operation switching member are the first to third positions.
The position is set at a position relatively farthest from the second pinch roller, the second and third positions are set closer to the second pinch roller than the first position, and the second and third positions supporting the second pinch roller are set. The two-pinch roller support member is rotatable about one point in a direction in which the second pinch roller is in contact with the second capstan and in a direction in which the second pinch roller is separated from the second capstan. When the second pinch roller is moved along with the movement of the second moving member to the advance position when the second pinch roller is arranged, the second pinch roller is engaged with the second pinch roller support member to press the second pinch roller against the second capstan. The position of the second pinch roller in the pressing direction in the second moving member advancing direction is the same when the operation switching member is in the second position and in the third position. Double cassette-type magnetic recording reproducing apparatus according to any one of claims 1 to 3, characterized in that is. 5. The first cassette and the second cassette are arranged at left and right positions in such a manner that the axial directions of the respective reels are parallel to each other, and the first moving member is provided at a first cassette side position. The second moving member, the movement preventing member, the operation switching member, the driving means, and the motor serving as a driving source of the driving means are provided in one mechanism part. The double cassette type magnetic recording / reproducing apparatus according to any one of claims 1 to 4, wherein the magnetic recording / reproducing apparatus is provided with: 6. The driving means has a cam surface which engages with and drives the second moving member, and a cam surface which engages with and drives the operation switching member. 6. A double-cassette type magnetic recording and reproducing apparatus according to claim 1, further comprising a cam means.